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authorChristian Krafft <krafft@de.ibm.com>2007-04-23 21:35:39 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-04-23 21:44:38 +0200
commit91a69c9646a5b709381d99a171890e77377b1b9c (patch)
tree3827389a195eecd0e010e53d926318328edab25f /arch/powerpc/platforms
parent390cbb56a731546edc0f35fbc4c5045676467581 (diff)
[POWERPC] cell: add cbe_node_to_cpu function
This patch adds code to deal with conversion of logical cpu to cbe nodes. It removes code that assummed there were two logical CPUs per CBE. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/cell/cbe_regs.c53
-rw-r--r--arch/powerpc/platforms/cell/cbe_regs.h5
2 files changed, 44 insertions, 14 deletions
diff --git a/arch/powerpc/platforms/cell/cbe_regs.c b/arch/powerpc/platforms/cell/cbe_regs.c
index 7c94af4ac43..dca39c0af7e 100644
--- a/arch/powerpc/platforms/cell/cbe_regs.c
+++ b/arch/powerpc/platforms/cell/cbe_regs.c
@@ -38,8 +38,13 @@ static struct cbe_thread_map
{
struct device_node *cpu_node;
struct cbe_regs_map *regs;
+ unsigned int thread_id;
+ unsigned int cbe_id;
} cbe_thread_map[NR_CPUS];
+static cpumask_t cbe_local_mask[MAX_CBE] = { [0 ... MAX_CBE-1] = CPU_MASK_NONE };
+static cpumask_t cbe_first_online_cpu = CPU_MASK_NONE;
+
static struct cbe_regs_map *cbe_find_map(struct device_node *np)
{
int i;
@@ -130,31 +135,40 @@ struct cbe_mic_tm_regs __iomem *cbe_get_cpu_mic_tm_regs(int cpu)
}
EXPORT_SYMBOL_GPL(cbe_get_cpu_mic_tm_regs);
-/* FIXME
- * This is little more than a stub at the moment. It should be
- * fleshed out so that it works for both SMT and non-SMT, no
- * matter if the passed cpu is odd or even.
- * For SMT enabled, returns 0 for even-numbered cpu; otherwise 1.
- * For SMT disabled, returns 0 for all cpus.
- */
u32 cbe_get_hw_thread_id(int cpu)
{
- return (cpu & 1);
+ return cbe_thread_map[cpu].thread_id;
}
EXPORT_SYMBOL_GPL(cbe_get_hw_thread_id);
+u32 cbe_cpu_to_node(int cpu)
+{
+ return cbe_thread_map[cpu].cbe_id;
+}
+EXPORT_SYMBOL_GPL(cbe_cpu_to_node);
+
+u32 cbe_node_to_cpu(int node)
+{
+ return find_first_bit( (unsigned long *) &cbe_local_mask[node], sizeof(cpumask_t));
+}
+EXPORT_SYMBOL_GPL(cbe_node_to_cpu);
+
void __init cbe_regs_init(void)
{
int i;
+ unsigned int thread_id;
struct device_node *cpu;
/* Build local fast map of CPUs */
- for_each_possible_cpu(i)
- cbe_thread_map[i].cpu_node = of_get_cpu_node(i, NULL);
+ for_each_possible_cpu(i) {
+ cbe_thread_map[i].cpu_node = of_get_cpu_node(i, &thread_id);
+ cbe_thread_map[i].thread_id = thread_id;
+ }
/* Find maps for each device tree CPU */
for_each_node_by_type(cpu, "cpu") {
- struct cbe_regs_map *map = &cbe_regs_maps[cbe_regs_map_count++];
+ struct cbe_regs_map *map;
+ unsigned int cbe_id;
/* That hack must die die die ! */
const struct address_prop {
@@ -162,6 +176,8 @@ void __init cbe_regs_init(void)
unsigned int len;
} __attribute__((packed)) *prop;
+ cbe_id = cbe_regs_map_count++;
+ map = &cbe_regs_maps[cbe_id];
if (cbe_regs_map_count > MAX_CBE) {
printk(KERN_ERR "cbe_regs: More BE chips than supported"
@@ -170,9 +186,18 @@ void __init cbe_regs_init(void)
return;
}
map->cpu_node = cpu;
- for_each_possible_cpu(i)
- if (cbe_thread_map[i].cpu_node == cpu)
- cbe_thread_map[i].regs = map;
+
+ for_each_possible_cpu(i) {
+ struct cbe_thread_map *thread = &cbe_thread_map[i];
+
+ if (thread->cpu_node == cpu) {
+ thread->regs = map;
+ thread->cbe_id = cbe_id;
+ cpu_set(i, cbe_local_mask[cbe_id]);
+ if(thread->thread_id == 0)
+ cpu_set(i, cbe_first_online_cpu);
+ }
+ }
prop = of_get_property(cpu, "pervasive", NULL);
if (prop != NULL)
diff --git a/arch/powerpc/platforms/cell/cbe_regs.h b/arch/powerpc/platforms/cell/cbe_regs.h
index 440a7ecc66e..17d59714487 100644
--- a/arch/powerpc/platforms/cell/cbe_regs.h
+++ b/arch/powerpc/platforms/cell/cbe_regs.h
@@ -255,6 +255,11 @@ struct cbe_mic_tm_regs {
extern struct cbe_mic_tm_regs __iomem *cbe_get_mic_tm_regs(struct device_node *np);
extern struct cbe_mic_tm_regs __iomem *cbe_get_cpu_mic_tm_regs(int cpu);
+/* some utility functions to deal with SMT */
+extern u32 cbe_get_hw_thread_id(int cpu);
+extern u32 cbe_cpu_to_node(int cpu);
+extern u32 cbe_node_to_cpu(int node);
+
/* Init this module early */
extern void cbe_regs_init(void);